Mother, father, child, but who is the seal? A mysterious picture book with exciting images by the "Master Heidelbach." The story of the magical transformation has never been told so vividly, tenderly, and contemporarily. Although Mom never goes into the water, she knows what exists beneath the surface: lampreys, dugongs, ink princes, sea trolls, and herring kings. And seals that come ashore, shed their fur, and become human. They guard their fur like a treasure so they can return to the sea once they have been human enough. When the boy suddenly discovers a seal skin under the sofa, he believes his dad is a seal. But one morning, Mom is gone...